(19)
(11) EP 0 411 598 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.01.1992 Bulletin 1992/05

(43) Date of publication A2:
06.02.1991 Bulletin 1991/06

(21) Application number: 90114739.7

(22) Date of filing: 01.08.1990
(51) International Patent Classification (IPC)5B27N 1/02, B27N 5/00
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR LI LU NL SE

(30) Priority: 02.08.1989 IT 2141489

(71) Applicant: Losio, Gianfranco
I-27029 Vigevano PV (IT)

(72) Inventor:
  • Losio, Gianfranco
    I-27029 Vigevano PV (IT)

(74) Representative: Lecce, Giovanni 
UFFICIO BREVETTI CALCIATI S.r.l. via G. Negri,10
I-20123 Milano
I-20123 Milano (IT)


(56) References cited: : 
   
       


    (54) Process for obtaining polyurethane compounds containing granules of cork or similar substances, particularly for the manufacture of soles for footwear, apparatus for realising this process, and the product so obtained


    (57) This procedure refers to the incorporation of granules of cork or similar substances into polyurethane products. The polyurethane components and the cork (or similar) granules are introduced simultaneously into a suitable mixing chamber (26), the granules being suitably dosed by variable speed programmable screw conveyors (or otherwise, for example pneumatic feeds, mechanical pistons, etc.). The conglomerate as above is introduced, while still in the early stages of reaction, into fixed or moveable moulds (40) or dies by gravity (with the mould open), or by injection (with the mould closed), and completes its reaction there, forming the product in times which vary according to the characteristics of the mixture used and the shape of the article produced. The moulds or dies are preferably kept at a temperature of about 50°C, though this is not critical since this factor also varies widely according to the polyurethanes used and the pieces being produced.







    Search report